Da

Da = 1

Da = 0.1

Da = 0.01

Da = 0.001

$\begin{array}{l}\eta =1/3\\ \xi =2/3\end{array}$

$u_1\left(\eta \right)=u_2\left(\eta \right)$

0.1068281

0.08214691

0.03908309

0.01714995

$u_2\left(\xi \right)=u_3\left(\xi \right)$

0.1046975

0.06834714

0.01327264

0.00107072

$\begin{array}{l}\eta =4\\ \xi =3/4\end{array}$

$u_1\left(\eta \right)=u_2\left(\eta \right)$

0.09037786

0.07064158

0.03455354

0.01513239

$u_2\left(\xi \right)=u_3\left(\xi \right)$

0.0883398

0.0574775

0.0110710

0.00101

$\begin{array}{l}\eta =0.49\\ \xi =0.51\end{array}$

$u_1\left(\eta \right)=u_2\left(\eta \right)$

0.1189297

0.08497432

0.0308578

0.01043350

$u_2\left(\xi \right)=u_3\left(\xi \right)$

0.1186918

0.0833988

0.02721074

0.00630965